odf posted at 11:27 PM Fri, 9 December 2022 - #4451375

Here's an even simpler FireFly version. Just diffuse -> step -> blender is enough. [...]

I didn't have time last night to sit down and think through the math(s) nodes, but they gave the impression of overkill at the time. Neatly simplified! Also thanks to @hborre for the Superfly version.

Encouraging to see that the good old forum samizdat still works. Now I should try to remember to put this to work next time I have a single sided mesh.